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ANALISIS DINAMIKA TINGKAT KEKERUHAN DAN KEDALAMAN RELATIF PERAIRAN DI WADUK SUTAMI KABUPATEN MALANG Alfi Nur Rusydi; Ferryati Masitoh
JFMR (Journal of Fisheries and Marine Research) Vol 5, No 2 (2021): JFMR VOL 5 NO.2
Publisher : JFMR (Journal of Fisheries and Marine Research)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2021.005.02.16

Penurunan fungsi waduk Sutami yang berupa sedimentasi intensif dalam kurun waktu 2013-2019 perlu dilakukan upaya identifikasi dan monitoring. Upaya ini dilakukan dengan memanfaatkan teknologi penginderaan jauh yang bertujuan untuk menganalisis dinamika sedimentasi perairan berdasarkan kedalaman relatif air dan tingkat kekeruhan air di waduk Sutami pada musim kemarau tahun 2013-2019. Citra satelit Landsat 8 OLI diolah untuk mendapat nilai Relative Water Depth (RWD) dan Normalized Difference Turbidity Index (NDTI). Hasil penelitian menunjukkan bahwa pada tahun 2013 hingga tahun 2019, kenampakan air keruh cenderung teridentifikasi di bagian timur waduk yang juga merupakan inlet waduk Sutami. Analisis kedalaman relatif air dilakukan untuk mengetahui dampak sedimentasi terhadap perubahan kedalaman perairan. Tingkat kekeruhan dan kedalaman relatif perairan tidak berhubungan langsung yang kuat secara statistik. Semakin keruh suatu perairan, maka belum tentu kedalaman relatif pada perairan tersebut menjadi semakin dangkal. Proses sedimentasi perairan di waduk Sutami yang terjadi pada tahun 2013-2019 menunjukkan bahwa proses tersebut dipengaruhi oleh tingkat kekeruhan.

Kajian hidrogeomorfologi pada DAS orde 0 (nol) di Dusun Brau Kota Batu Ferryati Masitoh; Alfi Nur Rusydi; Ilham Diki Pratama
Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi Vol 24, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (928.748 KB)

This study aims to obtain an overview of hydrogeomorphological conditions in Zero Order Basin in Brau Village. Quantitative approaches are used by using primary and secondary data sources. Primary data includes: geomorphological, geological, and hydrological conditions. Secondary data used is Topographic Map data. The result of the study was in the form of a hydrogeomorphology of Zero Order Basin in Brau Village. Steep topography causes landslides, and water flows down gravitatively along the slope. The process of sedimentation occurs in a narrow depression zone located around seepage and springs. Tuffs and breccias (with cracks) cause high both porosity and permeability. Surface flow is not visible, but the baseflow occurs over the year. The baseflow that comes out as seepage and spring, is located in the bending area of the slope which has a narrow depression zone. The springs belt is formed at an elevation of 1,120-1,140 masl. The main function of Zero Order Basin in Brau Village is to accumulate water to form a complex river network system.Penelitian ini bertujuan untuk mendapatkan gambaran kondisi hidrogeomorfologi pada DAS Orde 0 (Nol) di Dusun Brau. Pendekatan kuantitatif digunakan dengan sumber data primer dan sekunder. Data primer mencakup: kondisi geomorfologi, geologi, dan hidrologi. Data sekunder yang digunakan adalah data Peta Topografi. Hasil kajian berupa deskripsi hidrogeomorfologi DAS Orde 0 (Nol) di Dusun Brau. Topografi curam mengakibatkan terjadinya longsor dan air mengalir secara gravitatif menuruni lereng. Proses sedimentasi terjadi pada zona depresi sempit di sekitar rembesan dan mata air. Tuff dan breksi (dengan retakan) menyebabkan tingginya porositas dan permeabilitas. Aliran permukaan tidak nampak, tetapi aliran dasar terjadi sepanjang tahun. Aliran dasar yang keluar sebagai rembesan dan mata air, berada pada daerah tekuk lereng yang memiliki zona depresi yang sempit. Sabuk mata air terbentuk pada elevasi 1.120–1.140 mdpl. Fungsi utama DAS Orde 0 (Nol) di Dusun Brau yaitu untuk mengakumulasikan air sebelum terbentuknya sistem jaringan sungai yang lebih kompleks.DOI: http://dx.doi.org/10.17977/um017v24i22019p073

Pendekatan Hidrogeomorfologi Dan Pendugaan Geolistrik Untuk Identifikasi Potensi Airtanah Di Jedong Malang Ferryati Masitoh; Alfi Nur Rusydi; Ilham Diki Pratama
Jambura Geoscience Review Vol 3, No 2 (2021): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jgeosrev.v3i2.10252

This study aims to identify the potential groundwater in Jedong, Malang, East Java. The hydrogeomorphological approach is a suitable approach to describe the relationship between hydrological and geomorphological processes on and below the earth's surface. The survey of geoelectricity complements the hydrogeomorphological approach. It will give a better description of the groundwater conditions below the earth's surface. Based on the research, there are 2 hydrogeomorphological units in the study area, which are: Volcanic Foot Valley Unit and Volcanic Foot Ridge Unit. The best groundwater potential is in Volcanic Foot Valley Hydrogeomorphological unit, namely Awar-awar Valley and Cokro Valley. The valleys are dominated by gully erosion and landslides. They have surface deposits up to a depth of 7 meters, and lots of outcrops of breccia, pumice, and andesite boulders. The valley’s springs discharge between 56 - 198 m3/day. The average infiltration rate in the valley is 1776 mm / hour, with sandy soil material. The best aquifer consisting of sandy material is more than 10 meters in depth, based on the geoelectrical survey. Water in the aquiclude layer, cannot be exploited because it is breccia and tuff material. The Sawah valley cannot be exploited further because the groundwater potential is very low. This can be identified by the thick water outflow seepage. In the Volcanic Foot Ridge Hydrogeomorphological unit, the groundwater potential is also very small. Hydrogeomorphically, water will flow down the slope to the valley. It will reduce the infiltration rate. In general, the ridge area is only used for settlement, while the slopes are used for dryland agriculture. The geoelectric analysis results show that the groundwater potential is at a depth of more than 45 meters. This research’s results show that the combination of the hydrogeomorphological approach and the geoelectric use will provide a better description of the potential groundwater.

EVALUASI PENGALAMAN PENGGUNA PADA E-COMMERCE SOCIOLLA.COM MENGGUNAKAN USABILITY TESTING DAN USER EXPERIENCE QUESTIONNAIRE (UEQ): USER EXPERIENCE EVALUATION ON SOCIOLLA.COM E-COMMERCE USING USABILITY TESTING AND USER EXPERIENCE QUESTIONNAIRE (UEQ) Shandranuur Fauziah Novitasari; Yusi Tyroni Mursityo; Alfi Nur Rusydi
Jurnal Sistem Informasi, Teknologi Informasi, dan Edukasi Sistem Informasi Vol 1 No 2 (2020): Desember
Publisher : Fakultas Ilmu Komputer Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25126/justsi.v1i2.9

Sociolla merupakan e-commerce terlengkap dan terpercaya di Indonesia yang menjual produk kecantikan dan perawatan kulit dan tubuh. Demi mempermudah akses untuk mendapatkan kosmetik yang diinginkan, website Sociolla dibuat pada tahun 2015. Website sociolla bertujuan memudahkan konsumen untuk mendapatkan informasi mengenai kandungan dan harga kosmetik. Permasalahan yang terjadi pada website Sociolla adalah setiap pengguna yang melakukan interaksi pada website merasa bahwa website Sociolla memerlukan waktu yang cukup lama untuk setiap tugas. Dampak dari kesalahan sistem yang berulang tersebut, membuat banyaknya pengguna enggan melakukan aktivitas pada website. Dari permasalahan tersebut, maka dilakukanlah evaluasi usablity untuk mengetahui pengalaman pengguna menggunakan pengujian skenario Usability Testing, kuesioner SUS dan metode UEQ. Hasil pengujian skenario parameter Task Completed memiliki nilai keberhasilan sebesar 0.91, parameter Error Rate memiliki rata-rata jumlah kesalahan sebesar 0.05467, parameter Time per Completed Task memiliki rata-rata waktu sebesar 45.313 detik dan parameter Number of Clicks memiliki rata-rata sebesar 5 klik. Hasil kuesioner SUS mendapatkan skor 75.75 yang termasuk dalam kategori Acceptable. Hasil pengalaman pengguna menunjukkan yaitu pada metode UEQ, aspek pragmatic quality dengan nilai sebesar 3.05, dan aspek hedonic quality dengan nilai sebesar 2.23. Dalam penelitian ini dapat disimpulkan bahwa website Sociolla dapat diterima dengan baik oleh pengguna.

Development of Web-based Geographic Information System for Water Quality Monitoring of Watershed in Malang Novita Rosyida; Layta Dinira; Alfi Nur Rusydi; Agung Dwi Saputra; Ginanjar Setiabudi
INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi Vol 6 No 2 (2022): August 2022
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/intensif.v6i2.17514

Human activity and climate change significantly impact water quality, especially in Malang's watershed. This research aims to develop a web-based Geographic Information System (Web- GIS) for water quality monitoring in that watershed. The water quality data had been collected from Enviromental Office of Malang District and Malang City. Water quality in this application was determined using the STORET method, comparing water quality data to water quality standards according to Government regulation so that the water quality status at each monitoring point will be known. The total 57 monitoring points are visualized spatially in this application based on the sampling location plotted by Global Positioning System (GPS). The longitude and latitude coordinates of the monitoring location had been converted in GeoJSON using Quantum GIS (QGIS) software. Google Map API key was used to display a sampling location map on the website. Web-GIS application was tested functionally using a black box, compatibility, and usability testing. Based on the testing results, it worked correctly on Chrome, Edge, Mozilla, and Opera browsers for PC/Laptops and also for browsers on Android smartphones version 4 and above. The application could be appropriately used and efficiently based on usability testing results.

ANALISIS DINAMIKA TINGKAT KEKERUHAN DAN KEDALAMAN RELATIF PERAIRAN DI WADUK SUTAMI KABUPATEN MALANG Alfi Nur Rusydi; Ferryati Masitoh
JFMR (Journal of Fisheries and Marine Research) Vol. 5 No. 2 (2021): JFMR
Publisher : JFMR (Journal of Fisheries and Marine Research)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2021.005.02.16

Penurunan fungsi waduk Sutami yang berupa sedimentasi intensif dalam kurun waktu 2013-2019 perlu dilakukan upaya identifikasi dan monitoring. Upaya ini dilakukan dengan memanfaatkan teknologi penginderaan jauh yang bertujuan untuk menganalisis dinamika sedimentasi perairan berdasarkan kedalaman relatif air dan tingkat kekeruhan air di waduk Sutami pada musim kemarau tahun 2013-2019. Citra satelit Landsat 8 OLI diolah untuk mendapat nilai Relative Water Depth (RWD) dan Normalized Difference Turbidity Index (NDTI). Hasil penelitian menunjukkan bahwa pada tahun 2013 hingga tahun 2019, kenampakan air keruh cenderung teridentifikasi di bagian timur waduk yang juga merupakan inlet waduk Sutami. Analisis kedalaman relatif air dilakukan untuk mengetahui dampak sedimentasi terhadap perubahan kedalaman perairan. Tingkat kekeruhan dan kedalaman relatif perairan tidak berhubungan langsung yang kuat secara statistik. Semakin keruh suatu perairan, maka belum tentu kedalaman relatif pada perairan tersebut menjadi semakin dangkal. Proses sedimentasi perairan di waduk Sutami yang terjadi pada tahun 2013-2019 menunjukkan bahwa proses tersebut dipengaruhi oleh tingkat kekeruhan.

Analisis Pengaruh Kualitas Layanan BCA Mobile terhadap Tingkat Kepuasan dan Liyalitas Nasabh Berdasarkan Model E-S-Qual dan E-Recs-Qual Roshidah Nur Halimah; Yusi Tyroni Mursityo; Alfi Nur Rusydi
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 9, No 6: Desember 2022
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25126/jtiik.2022964660

Turunnya indeks brand BCA Mobile secara signifikan pada tahun 2019 serta banyaknya kritik terkait layanan di App Store dan Play Store menjadi alasan utama penelitian ini dilakukan, dengan tujuan mengetahui seberapa besar pengaruh mutu layanan BCA Mobile pada kepuasan serta loyalitas nasabah BCA Kota Surabaya. Skala E-Service-Quality dan E-RecoveryService-Quality yang telah dimodifikasi sesuai kebutuhan adalah acuan model penelitian. Sampel penelitian berjumlah 100 orang pengguna BCA Mobile Kota Surabaya yang dikumpulkan menggunakan metode purposive sampling. Analisis parametrik dengan menggunakan regresi linier berganda dan uji korelasi Rank Spearman digunakan dalam penelitian ini. Hasil penelitian menunjukkan bahwa variabel bebas efficiency, system availability, fullfilment, privacy, compability of mobile devices, responsiveness, dan contact berpengaruh signifikan secara simultan dengan tingkat korelasi sejumlah 54,8% pada variabel terikat satisfaction. Sementara secara parsial, hanya variabel efficiency dan compability of mobile devices yang memiliki pengaruh signifikan pada kepuasan nasabah. Selain itu diketahui bahwa variabel bebas satisfaction memiliki hubungan positif dan berpengaruh secara signifikan sejumlah 22% pada loyalitas.. Dapat disimpulkan bahwa BCA Kota Surabaya perlu meningkatkan kualitas layanan BCA Mobile karena memiliki pengaruh signifikan pada persepsi nasabah terkait kepuasan supaya pengguna dapat lebih loyal. AbstractThe significant decline in the BCA Mobile’s brand index in 2019, as well as the many criticisms related to its services on the App Store and Play Store are the main reasons for this research, with the aim of knowing how much influence the quality of BCA Mobile services has on customer satisfaction and loyalty of BCA Surabaya customers. The E-Service-Quality and E-RecoveryService-Quality scales that have been modified as needed are the research model references. The research sample amounted to 100 users of BCA Mobile Surabaya which were collected using purposive sampling method. Parametric analysis using multiple linear regression and Spearman Rank correlation test were used in this study. The results showed that the independent variables efficiency, system availability, fulfillment, privacy, compatibility of mobile devices, responsiveness, and contact had a significant effect simultaneously with a correlation level of 54.8% on the dependent variable satisfaction. While partially, only efficiency and compatibility of mobile devices variables have a significant influence on customer satisfaction. In addition, it is known that the independent variable satisfaction has a positive relationship and has a significant effect of 22% on loyalty. It can be concluded that BCA Surabaya needs to improve the quality of BCA Mobile services because it has a significant influence on customer perceptions of satisfaction so that customers can be more loyal.

Identification of Sea Surface Temperature Anomaly during Earthquake in Southern Java Island using Google Earth Engine Datasets Alfi Nur Rusydi; Ferryati Masitoh
Indonesian Journal of Geography Vol 55, No 1 (2023): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.68247

The certainty of Sea Surface Temperature (SST) anomaly during earthquakes in Java Island was still not clear identified. This research tried to identify any possibilities of SST anomaly during earthquake in Southern Java Island. It used Google Earth Engine datasets including daily NOAA Climate Data Record (CDR) - Woods Hole Oceanographic Institution (WHOI): Sea Surface Temperature Version 2 which has resolution of 0.25 arc degrees for 20 years and processed them to depict SST trends in pre-earthquake and post-earthquake situation. The statistic test of t-Test Paired Two Sample was also applied to certain the significant difference of SST in both situations. SST fluctuation during the earthquake was still inconsistent and unclear to consider as an anomaly. There were other complicated factors excluding earthquake to influence SST fluctuation. The earthquake did not trigger directly to fluctuate SST, even not to make it being an anomaly.

Pengembangan Sistem Informasi Geografis Berbasis Website (WEBGIS) Untuk Simulasi Pemetaan Daerah Genangan Banjir Rob Menggunakan Metode Neighbourhood Analysis (Studi Kasus : Pantai Utara Kota Surabaya) Taufik Brillian Nur; Alfi Nur Rusydi; Satrio Agung Wicaksono
Jurnal Pengembangan Teknologi Informasi dan Ilmu Komputer Vol 2 No 11 (2018): November 2018
Publisher : Fakultas Ilmu Komputer (FILKOM), Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1101.644 KB)

The North Coast Area of Surabaya City is an area that has great potential for the occurrence of tidal floods. The magnitude of the potential because of that area has a sea level rise as high as 5.47 mm per year within 64 years. In addition, by looking at the geographical condition of Surabaya, which consists of 80.72% of the area with low land, also adds threats to the occurrence of tidal flood disasters of the region. Based on the data that recorded in 2010, there has been a tidal flood in part area of Surabaya City that has caused the loss of property, submerged industrial area, disturbed activity of harbor and submerged part of the farm area located in District of Benowo, Asemrowo and Krembangan. Therefore, by looking at the magnitude of the impact caused by the tidal flood, it is needed a Geographic Information System based website (WEBGIS) that can simulate the inundation area of the rob and can explain the kind of landuse that affected by the tidal flood in that area. Related methods used to create the inundation area using the Neighborhood Analysis function found in ILWIS application. Based on the simulation results in each scenario shows that the most dominant landuse affected is farming with minimum impact of 155.7 ha and maximum impact of 374 ha. As for the results of system testing shows with black-box testing certainly functional system can run 100% with system compatibility rate of 73%.

Pengembangan Sistem Informasi Geografis Untuk Penentuan Tingkat Kenyamanan Rute Bagi Pejalan Kaki Lingkup Kampus Universitas Brawijaya Ahmad Zaky Syihan; Alfi Nur Rusydi; Mochamad Chandra Saputra
Jurnal Pengembangan Teknologi Informasi dan Ilmu Komputer Vol 3 No 1 (2019): Januari 2019
Publisher : Fakultas Ilmu Komputer (FILKOM), Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.485 KB)

Brawijaya University is one of the biggest campus located in Malang city. In daily basis, there is a lot of people doing their activities by walking in campus area. From many walking activities, the comfort level of pedestrian routes needs to be considered. But there is no data that can represent the level of comfort in pedestrian routes throughout the University of Brawijaya. To determine the comfort level of pedestrian routes in the entire University of Brawijaya, it needs spatial analysis with the development of geographic information system that can produce information about the comfort level of pedestrian routes in the entire University of Brawijaya. To obtain information about the comfort level of pedestrian routes, data acquisition activities is needed in the form of aerial photography and road networks. The acquired data is then processed using the semi automatic classification method to obtain wide canopied vegetation distribution data, which is a determining factor in the comfort level of pedestrian routes in this study. Then the data will be implemented into the system that can be accessed by pedestrians in Universitas Brawijaya to obtain the information. Geographical information systems are then tested using black box and user acceptance testing. It Obtained 100% black box test results which states that the system can fulfill all the user requirements. In user acceptance testing, the overall result is 83.83% which describes the user can receive the system well in the three criteria tested, namely performance, usability, and accuracy.

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